Road machine



Jan. 1, 1935. I c. 0. wow 1,986,173

ROAD MACHINE Filed Jan. 7, 19:53 5 Sheets-Sheet i INVENTOR.

CARL 0. Wou;

C. O. WOLD ROADMACHINE Jail. 1,1935.

Filed Jan. 7, 1955 5 Sheets-Sheet 2 INVENTOR.

CARL 0. WOLD C. O, WOLD ROAD MACHINE Jan. 1, 1935.

Filed Jan. 7, 1935 5 ShGStS ShGQt 3 t Sv.

IN VEN TOR.

CARL. 0. HOLD A T70R16;

Patented Jan. 1, 1935 UNITE!) STATES ROAD momma Carl 0. Wold, Peoria, 111., assignor to Caterpillar Tractor (70., San Leandro, Calif., a corporation of California Application January 1, weasel-m No. 650,594

-23 Claims. (01. 37-156) The present invention relates to road machines and more particularly to power-operated adjusting means for the earth-engaging tool thereof. In the usual grader construction, the earth-en- I gaging tool is mounted on a rotatable supporting frame or member and is provided with aligned pivotal connections therewith and with aligned manually adjustable connections whereby the inclination of the tool is adjustable to vary the angle of attack of the cutting edge with respect to the ground. It is frequently desirable during grading operations to vary the angularrelation of the blade with respect to the ground, and in the usual type of grader heretofore known, it

is necessary for the operator to stop the machine. leave the operator's station, and then perform a rather laborious manipulation of clamping bolts and similar devices. Obviously, this results in a loss of time which can otherwise be used in useful grading work and also requires additional labor on the part of the operator. In some machines the above disadvantages are overcome by providing a tool supporting frame which can be adjusted angularly with respect to the drawbars. by oscillating the tool supporting frame about'a transverse axis to raise or lower the front end thereof, and, as a result, the leading end of the tool is also raised or lowered with the front end of the supporting frame. Thus the above adjustment, while varying the inclination of the tool with respect to the road, also changes the plane of operation of the cutting edge, whereby it is necessary to adjust the tool vertically as well as to oscillate the tool supporting frame in order to vary the inclination of the tool with respect to the ground while maintaining the same plane of operation of the cutting edge. Thus, even though power-operated control means are provided for making the above adjustments, it is necessary to operate a pluralityof adjusting mechanisms to obtain an adjustment of the blade.

The present invention eliminates the disadvantages of the types of structures outlined above by providing power-operated means operable by a singlecontrol lever to vary the inclination of the blade with respect to the surface of the earth whereby the operator has instantand posi-'- tive control of the blade adjustment through a single adjusting mechanism which can be operated without stopping operation of the machine and without leaving the operator's station.-

It is an object of the invention to provide an improved-adjusting means for the earth-engaging tool of a road machine.

This adjustment is usually accomplished Another object of the invention is to provide power-operated means for adjusting the mrth-' engaging tool of a road machine with respect to its supporting member.

Another object of the invention is to provide 5 power-operated adjusting means for varying the angle between the earth-engaging tool of a road machine and the surface of the road.

Another object of the invention is to provide power-operated adjusting means for varying the 10 angle of attack of the earth-engaging tool of a road machine.

Another object of the invention. is to provide a road machine having an earth-engaging tool having alined pivotal connections and alined tele- 15 Fig. 1 is a side elevation of a road machine embodying the instant invention.

Fig. 2 is a plan view of the blade and circle assembly.

Fig. 3 is a rear elevation of the blade and circle assembly.

Fig. 4 is a vertical longitudinal section through the blade and circle assembly, taken on the line 4-4 in Fig. 2.

Fig. 5 is a section taken on the line 55-in Fi 3.

Fig. 6 is a vertical longitudinal section illustrating the power control mechanism.

Fig. '7 is a diagrammatic view illustrating the power-operated means for adjusting thebladeof a road machine.

Figs. 8 to 10 illustrate a invention.

Fig. 8 is a rear elevation of the blade and cir-' cle assembly.

Fig. 9 is a vertical longitudinal-section through the blade and circle assembly.

Fig. 10 is a section on the line 10- -l0 in Fig. 8.

Description of machine The main frame of the machine (Fig. 1) is substantially symmetrical with respect to its longitudinal axis and includes similar side channels 10, one ofswhich is seen in Fig. 1, which are interconnected by various cross members and braces. The front end of the frame is supported upon second. form of the front wheel and axle assembly 11 which is provided with a draft connection to a tractor or other suitable traction vehicle. At its rear end the frame is supported on rear wheel and axle assembly 12. The specific constructions of the wheel and axle assemblies form no part of the instant invention, and consequently are not described in detail.

The blade or tool is adiustably connected in a manner hereinafter described to a tool supporting or mounting framework or member, including circle 21 and circle beam 20, which is bent into a semi-circle in its central portion which encompasses and is riveted to circle 21 (Fig. 2) Circle 21 may be formed of a single piece of angle having its ends joined. End portions 23, 24 (Figs. 2 and 4) of beam 20 extend tangentially from the circle and downwardly, their lower ends being apertured for connection to the blade as hereinafter described. In order to rigidly connect the ends of the beam to the circle, brackets 25, 26 (Fig. 3) are riveted to end portions 23, 24, respectively. The upper ends of brackets 25, 26 are riveted to the ends of channel 27 which is rigidly connected to circle 21 by brackets 28, 29. In addition the lower ends of brackets 25, 26 have g'usset connections with inclined braces 30, 31, the inner ends of which are riveted to channel 27-.

The circle is revolvably mounted in an auxiliary framework or tool supporting frame consisting of forwardly converging drawbars 32, 33 (Fig. 2) and rear cross bar 34. The rear end of drawbar 32 is rigidly connected with the left end ofrear cross bar 34 by bracket 35. The rear end of drawbar 33 is similarly connected to the right end of rear cross bar 34 by bracket 36. Intermediate their ends, drawbars 32, 33 are connected by casting 37 bolted therebetween, and said casting 37 (Fig. 4) is provided with arcuate ledge 38 which supports the front of circle 21. Brackets 35, 36 (Fig. 2) are provided with similar. arcuate ledges for supporting the circle at the rear. Adjustable rub irons are provided in said casting at the front corners thereof and in said brackets to "take up play between the circle and its supp rts.

Said drawbars 32, 33 converge forwardly to connection 39 to which they are bolted. Draft bolt 40,

(Figs. 1 and 2) is mounted in said connection 39 and has-a limited universal connection with pin 41 (Fig. 1) which provides a draft connection between the drawbars and the front end of the frame.

As stated hereinbefore, the circle is revolvably mounted in its supp rting framework whereby the angle vof the blade with respect to the line of draft can be varied. The blade is also adjustable by movement of the circle supporting framework laterally with respect to the frame of the machine and vertically at either end. These latter adjustments are possible because of the limited universal movement of drawbars 32, 33 about the intersection of the axes of bolt 40 and pin 41.

To summarize the movements of adiustmentof which the tool supporting circle is capable, they are. an arcuate movement in horizontal planes about the vertical axis of pin 41; an arcuate movement in vertical planes containing the axis of pin 41; oscillation about the axis of bolt 40; and oscillation of the circle about its center. The desired blade adjustment is usually obtained by a combination of these movements. Power-operated means are provided for controlling the operation of the adjusting mechanisms which accomplish each of the above outlined adjustments.

The blade lift which serves to oscillate the circle about the axis of bolt 40 (Fig. 1) includes similar extensible lift links 44, only one of which is seen in Fig. 1, which are connected at their lower ends to rear cross bar 34 adjacent its ends, and at their upper ends are universally connected to lift arms 45 (Figs. 1 and 7). Said lift arms are similar and similarly mounted, and only one will be described in detail. Right-hand lift arm 45 (Fig. 1) is mounted on shaft 46 supported on the frame at its front end and in housing 47 at its rear end. Said housing 47 contains worm wheel 48 (Fig. 7) and worm 49 which are operated in a manner, to be hereinafter described, by a reversible clutch mechanism to oscillate lift arm 45 in either direction. It is believed to be apparent from the foregoing description that oscillation of lift arms 45 serve to raise'or lower the respective ends of the blade independently or simultaneously.

The arcuate movement of the circle about the axis of pin 41 (Fig. 1) as a center is accomplished through center shift link 51 which is connected at its lower end to rear cross angle 34 and at its upper end to rack 52 slidably mounted on T-bar 53 secured to the frame. Said rack 52 meshes with and is adapted to be operated by pinion 54 from the power-operated control mechanism in a manner hereinafter described.

. The oscillation of the circle about its center is accomplished by means including rack secured thereto (Fig. 4) and pinion 61 meshing therewith. Pinion 61 is driven through suitable worm wheel mechanism 62 in housing 63 mounted on casting 37. Said worm and worm wheel mechanism is driven in a manner hereinafter described from the power-operated control mechanism. The circle is adapted to be locked in adjusted position with respect to its supporting frame. For this purpose, the inwardly extending flange of circle 21 (Fig. 2) is provided with a series of notches 65 adapted to cooperate with suitable locking means 66 mounted on casting 37 and controlled by rod 67 extending forwardly therefrom to guide 68 on drawbar 32. Said rod 67 is operated through connection 69 (Figs. 1 and 2) which extends rearwardly to the operator's station. Thus the circle is adapted to be locked in its rotated, adjusted position.

From the foregoing description it is seen tha the blade supporting member and the blade are adjustable vertically, laterally, and rotatably, locking means being provided to maintain the blade and its supporting member in any rotated position thereof. In addition, power-operated means are provided for varying the angle of the blade with respect to the surface of the road and to accomplish this purpose. the blade is ad justably connected to its supporting member.

Blade 70 (Figs. 3 and 4) includes cutting edge 71 secured to moldboard 72 along the lower edge thereof, and end bits 73 secured to said moldboard at its ends and overlapping cutting edge 71. Angle bracket 74 is secured to moldboard 72, and angle 75 is secured to the trailing edge of angle bracket 74. Similar brackets 76 are mounted on angle bracket 74 and are apertured to receive pins 77 which pass therethrough and through the apertures in end portions 23,. 24 of circle beam 21. Thus a pivotal connection is provided between the blade and its supporting beam adjacent the lower ends thereof. Adjacent its upper edge, 'moldboard 72 (Figs. 2 and 4) is provided with brackets 80 in which adjustable connections to circle beam 21 are mounted. Each of these connections is similar.

The right hand connection comprises a telescopic connection including screw 81 (Fig. pivoted in bracket 80 and having threaded engagement with nut 82, mounted in housing 83. Said screw 81 passes through alined apertured bosses 84, 85 in said housing 83, and nut 82 is held between said bosses, suitable thrust washers being interposed. The mounting for said housing 83 on end portion 24 of beam 21 provides for oscillation thereof about a transverse axis during relative adjustment of screw 81 and nut 82 and is described hereinafter. It is believed to be apparent thatrotation of nut 82 will cause movement of screw 81 therethrough whereby the blade is oscillated about the axis of pin 77. During suchmovement of screw'81, the portion thereof projecting through housing 83 is protected by shield 86 threaded within said boss 84. I

A similar telescopic connection including nut 87 (Fig. 3) and screw 88 is provided between the left end of the blade and the left end portion 23 of beam 21. mounted in housing 89 similar to housing 83 and having cover 90. Housing 89 and cover 90 have aligned integral trunnions 91, 92 journaled in end portion 23 and bracket 93 secured to said end portion. Collar 94 mounted on trunnion 91 locates housing 89 with respect to end portion Said housing 83 issimilarly mounted'in.

bracket 95 and end portion 24. Nut 82 (Fig. 5) and nut 87 (Fig. 3) are driven simultaneously whereby the same adjustment is obtained at each end of the blade.

Nut 87 has integral bevel gear 96 meshing with bevel gear 9'7 on shaft 98 which hasa universal joint with telescopic shaft 99. Nut 82 is similarly driven from telescopic shaft 100. 99, 100 extend inwardly along the pivotal axis of the telescopic connections with end portions 23,24 of beam 21 and have respective universal connections with shaft 101 (Fig. 4) mounted in housing 102 secured to cross channel 27 centrally thereof. Bevel gear 103 is mounted on said shaft 101 within housing 102 and'meshes with bevel gear 104 on shaft 105 extending through said housing. Shaft 105 is universally connected with telescopic shaft 107, which is also universally connected with shaft 109 mounted in housing 111. Saidhousing 111 is rotatably supported on circular boss 112 of housing 113. Said boss 112 is provided with a peripheral groove engaged by set screws 114 in housing 111. Strap 115 is secured at its center to the bottom of housing 111 and at its ends (Fig. 2) to circle 21'. It is seen, therefore, that housing 111 rotates with circle 21 upon adjustment thereof. Said housing 113 (Fig. 4) is mountedon bracket 116 bolted to rear cross angle 34 and to casting 37. Shaft 109 mounted in housing 111 has bevel gear 120 meshing with bevel gear 121 on shaft 122 mounted in said housing 113. The axis of shaft 122 coincides with the center of the circle whereby Said nut 87 and screw 88 are Said shafts joint 12 (Fig. 1) to telescopic shaft iisjviu il has a universal joint with shaft 132 mounted in bracket 133 on the frame. Said shaft'132 has a universal joint with shaft 136 which has universal joint 137 with shaft 138 (Fig. 6). Shaft 138 is mounted in bosses 141, 142 in power clutch control housing 143 and cover- 144 therefor, respectively. Said housing 143 (Fig. 1) is suitab y mounted in the frame adjacent'the operators station above motor 146.

The above described driving train is operable in either direction, in a manner about to be described, to adjust the blade with respect to its supporting beam to vary the inclination of the blade with respectto the ground. It will be recalled that the telescopic connections, each comprising a nut and a screw, are driven from a common shaft so that said nuts are driven oppositely. Consequently the nuts and screws are oppositely threaded to provide for adjustment of the ends of the blade in the same direction;

The power control mechanism disclosed herein comprises reversible clutching mechanisms driven from the motor and controllable by the operator to drive the'adjusting mechanisms in either di rection. The drive from the motor is transmitted through belts 151 (Fig. 6) to sheaves 152 on shaft 153 mounted in housing 154. Said shaft 153 carries worm 156 meshing with worm wheel 157 on vertical shaft 158. Said shaft 158 is mounted in bushings in housing 159 to which said housing 154 is bolted and which is bolted to the under side of housing 143. At its'upper end said shaft 158 has bevel gear 161 keyed thereon which positely rotating gears 162, 163 to shaft 138.

Movement of said clutch element 166 is controlled by-fork 168 engaging a peripheral groove formed therein and pinned on shaft 169. Said shaft 169 is mounted in suitable bosses in housing 143 and cover-144, and is provided at -its front end with a peripheral -groove.1'71 adapted to be engaged by spring-pressed ball 172 when said shaft 169 andclutch element 166 are in neutral position. Said shaft 169 extends through cover 144, and control lever 173 is pivoted to the rear end thereof. Said. control lever 173 is provided with a rounded lower end 174 mounted in apertured boss 1'75 on cover 144. Thus a pivotal floating mounting is provided for control lever 173 which accommodates vertical movement of said lever during longitudinal movement of said shaft 169 in controlling operation of the reversible clutching mechanism.

It is believed to be apparent'from the foregoing description that movement of control lever 173 forwardly or rearwardly of the machine determines engagement of the reversible clutching mechanism described above to operate the telescopic connections between the ends of the beam and the blade. The driving train from the clutch to the telescopic connections is indicated diagrammatically in Fig. 7.

Similar reversible clutch mechanimns are provided for operating the 1m; arms, the center shift, and for shifting the circle about its center. Bevel gears 162, 163 (Fig. 6) are provided with integral spurgears 180, 181. These opposite spur gears form parts of two opposite trains of intermeshing spur gears forming parts of similarreversible clutch mechanisms. For convenience of illustration in the diagrammatic view (Fig. 7) the drive from the engine is shown applied to the reversible clutch mechanism at the right end of housing 143 instead of being connected to the reversible clutch mechanism described in connection with Fig. 6. As readily understood from an inspection of Fig. 7, a reversible clutch mechanism 183, similar to that described above, and controlled by lever 184, serves to drive the lefthand lift arm 45. Similar reversible clutch mechanism 185 having control lever 186 serves to drive selectively the center shift or the shift of the circle about its center by a suitable selective clutch mechanism, not disclosed herein. Similar reversible clutch mechanism 187, having control lever 188, serves to drive the right-hand lift arm 45. Thus it is seen that the power-operated control mechanism serves to operate each of the blade adjusting mechanisms. I

In the second form of the invention illustrated in Figs. 8 to. 10, blade 70 is provided with angle bracket 200 (Fig. 10) having a wider horizontal flange than angle bracket 74 described hereinbefore, whereby the blade is supported at a greater distance from end portions 23, 24 of the beam. This additional spacing is provided to accommodate housing 201 which is pivotally mounted in bracket 80 and has screw 202 mountscopic shaft 208.

ed therein. Said screw 202 extends rearwardly through the cover of housing 201 and has threaded engagement with nut 203 pivotally mounted in end portion 24 and in bracket 204 bolted to said end portion as described hereinafter. Screw 202 is rotated whereby it is threaded through nut 203 in either direction to adjust the blade about the axis of pin 77. Gear 205 (Fig. 10) is pinned on screw 202 within housing 201 and the hub of said gear engages the cover on housing 201 thereby serving with the forward end of screw 202 which is seated in a boss in said housing, to locate said screw with respect to said housing. Said gear 205 transmits a drive to said screw from bevel gear 206 mounted on shaft 207 in' housing 201. Said shaft .207 (Fig. 8)v extends through housing 201 and has a universal joint with tele- A similar adjustable connection is provided at the left end of the blade, including screw 209 and nut 210. which has integral trunnions 211, 212 journaled in end portion 23 and bracket 213 secured thereto. A collar is secured on trunnion 211 on the inner side of end portion 23 and bracket 25. Screw 209 is driven similarly to screw 202 through telescopic shaft 214, and said shafts 208, 214 have respective universal joints with the ends of shaft 218 (Fig. 9) mountedin housing 219 bolted on moldboard 72 (Figs. 8 and 9). Bevel gear 221 (Fig. 9) keyed on shaft 218 within housing 219 meshes. with bevel gear 222 on shaft 223 which extends without said housing. Said shaft223 is connected by a universal joint with telescopic shaft 226 which has universal connection with vertical shaft 228 mounted in housing 229 similar to housing 113 heretofore described and similarly mounted. Said shaft 228 is driven through bevel gear 123 thereon, bevel pinion 124,and shaft 126, as heretofore described.

From the foregoing description it is seen that the drive for adjusting the angle of the blade with respect to the surface of the ground is brought from control means mounted 1n,a fixed position on the main frame, through the center of the circle and from thence directly to the blade itself, universal telescopic connections being provided to accommodate relative movement between the blade and its supporting member, and between the blade supporting member and the main frame.

Therefore, I claim as my invention:

1. In a road machine, a main frame, front and rear supports for said frame, an earth-engaging tool, a tool supporting frame having a draft connection with said mainframe, means for adjusting said supporting frame vertically with respect to said main frame, means for adjusting said supporting frame laterally with respect to said main frame, means for rotating said tool with respect to said supporting frame to vary the angular relation of said tool with respect to the line of draft, means'for adjusting said tool with respect to said supporting frame to vary the angular relation of said tool with respect to the surface of the ground, a source of power, and power control means operated from said source of power to operate said adjusting means.

2. In a road machine, a main frame having front and rear supports, an auxiliary frame having a draft connection with said main frame, an earth-engaging tool, a tool supporting member rotatably mounted in said auxiliary frame, aligned pivotal connections between said tool and said member, other connections between said tool and said member adiustable to vary the inclination of said tool with respect to the road, and means for effecting adjustment of said other connections simultaneously, including a control member on said main frame, a shaft mounted on said auxiliary frame and having its axis of rotation coinciding with the axis of rotation of said tool supporting member and connected to said other connections, and a flexible connection between said control member and said shaft.

3. In a road machine, a main frame having front and rear supports, an auxiliary frame having a draft connection with said main frame, an earth-engaging tool, a tool supporting member rotatably mounted in said auxiliary frame, aligned pivotal connections between said tool and said member, telescopic connections adjustable to vary the inclination of said tool with respect I to the road, and power-operated means for adjusting said telescopic connections simultaneously, including a housing mounted on said auxiliary frame and a vertical shaft mounted in said housing and having its axis of rotation coinciding with the axis of rotation of said member.

4. In a. road machine, a main frame having front and rear supports, an auxiliary frame having a draft connection with said main frame and being adjustable with respect thereto, an earthengaging tool, a tool supporting member rotatably mounted in said auxiliary frame, means for adjusting said tool with respect to'said member to vary the inclinationof said tool with respect to the surface of the road, power-operated control means mounted on said main frame, and a drive connection from said control means to said adjusting means including a shaft mounted on said main frame, a second shaft mounted on said auxiliary frame, and a third shaft mounted on said tool and connected to said adjusting means.

5. In a road machine, a main frame having front and rear supports, an auxiliary frame having a draft connection with said main frame and ing member,

being adjustable with respect thereto, an earthengaging tool, a. tool supporting member rotatably mounted in said auxiliary frame, means for adjusting said tool with respect to said member to vary the inclination of said tool with respect to the surface of the road, power-operated control means mounted on said main frame; and a drive connection from said control means to said adjusting means including a shaft mounted on said main frame, a second shaft mounted on said auxiliary frame, and a third shaft mounted on said member and connected to said adjusting means.

6. In a road machine, a main frame having front and rear supports, an auxiliary frame having a draft connection with said main frame and being adjustable with respect thereto, an earthengaging tool, a tool supp rting member rotatably mounted in said auxiliary frame, means for adjusting said tool relative to said tool supportpower-operated control means mounted on said main frame, and a drive connection from said control means to said adjusting means having a portion coincidingwith ,the axis of rotation of said member, said drive connection including flexible means for accommodating relative movement between said control means and said adjusting means during adjustment of said auxiliary frame with respect to said main frame.

"I. In a road machine, a frame, an earth-engaging tool, a tool supporting member adjustably supported from said frame for vertical and lateral movement with respect thereto, means for adjusting said tool with respect to said member to vary the inclination of said tool with respect to the surface of the road, power-operated cohtrol means mounted on said frame, and means for operating said adjusting means from said control means including an extensible, telescopic shaft between said frame and said member. 8. In a road machine, a frame having front and rear supports, an earth-engaging tool supported from said frame, means for adjusting said tool vertically at either end, laterally with respect to said frame, angularly with respect to the line of draft, and angularly with respect to the surface of the road, and power-operated control means for operating said adjusting means,including a drive connection to accomplish the anular adjustment, of said tool with respect to V the surface'of the ground,'said drive connection being operable in any adjusted position of said tool. .7 1 9. In a road machine, a main frame, an auxiliary frame having a draft connection with said main frame, an earth-engaging tool, a tool supporting member rotatably supp rted by said auxiliary frame, adjustable connections between said tool and said-tool supporting member, and control means for adjusting said connections, including a shaft and means journallingsaid shaft for rotation about an axis coinciding with the axis of rotation of said member. 10. In a road machine, a main frame, an aux-' iliary frame having a draft connection with said main frame, an earth-engaging tool, a tool supporting member rotatably mounted in said auxiliary frame, means for adjusting said tool with respect to said'tool supporting member, and control means for operating said adjusting means, including a control member on said main frame,

. and a shaft connection supported for'rotati on about an axis coinciding with the axis of rotation of said member. l

11. In a road machine, a main frame, an earthengaging tool, a tool supporting framework adjustably supporting said tool on said frame, said framework providing for rotation of said tool about an axis to vary the angle thereof with respect to the line of draft, means for adjusting said tool with respect to said framework, poweroperated control means for operating said adjusting means, and a drive connection from said control means to said adjusting means having a portion supported for rotation about an axis coinciding with the axis of rotation of said tool.

12. In a road machine, a main frame, an auxiliary frame having a draft connection with said main frame and being adjustable with respect thereto, an earth-engaging tool, a tool support: ing member rotatably mounted in said auxiliary frame, means for adjusting said tool with respect to said member, control means, and a drive connection from said control means'to said adjusting means, said drive connection including flexible means compensating for relative movement of said auxiliary frame and said tool supporting member.

13. In a road machine, a main frame, an auxiliary frame having a draft connection with said main frame and being adjustable with respect thereto, an earth-engaging tool, a tool supporting member movably mounted with respect to said auxiliary frame, means for adjusting said tool with respect to said member, control means mounted on said frame, and aIdrive connection iliary frame and said tool supporting member and for movement of said auxiliary frame and said tool supporting member with respect to said main frame.

14. In a road machine, a main frame, an earthengaging tool, a tool supporting framework connected to said main frame for vertical and lateral movement with respect thereto, said framework providing for rotation of said tool to vary the angle thereof with the line of. draft, means for adjusting said tool with respect to said tool supporting framework, control means on said frame for operating said adjusting means, and a flexible drive connection from said control means to said adjusting means providing for operation of said adjusting means in any displaced position of said framework with respect to said frame.

15. In a road machine, a frame, an earth-engaging tool supported from said frame, means mounting said tool on said frame for adjustment angularly with respect to. the line of draft and for adjustment laterally with respect to, said frame, means for adjusting said tool angularly with respect to the surface of the road, control means having a fixed position on said frame, and a flexible drive connection from said control'means to said adjusting means operable in any angularly and laterally adjusted position thereof.

'16. In a road machine, a frame, an earth-engaging tool supported from said frame, means mounting said tool on said frame for adjustment angularly with respect to ,the line of draft and for adjustment laterally with respect to said frame, means for adjusting said tool angularly with respect to the surface of the road; control means having a fixed position on said frame, and a flexible ,drive connection from said control means to said adjustingmeans operable inany of, said drive connection for said adjusting means having a portion coinciding with the axis of retation of said tool during adjustment of the angular relation thereof with respect to the line of draft.

1?. In a road machine, a frame, an earth-engaging tool, a tool supporting member, means for mounting said supporting member on said frame for vertical, lateral, and angular adjustment, whereby the vertical position of said tool, the lateral position of said tool with respect to said frame, and the angular relation of said tool with respect to the line of draft can be varied; a control member on said frame, means formounting said tool for adjustment on said supporting member, and means including a flexible connection between said second-named mounting means and said control'member for effecting adjustment of said tool on said supporting memberin any adjusted position of said supporting member with respect to said frame.

18. In a road machine, a frame having front and rear supports, an earth-engaging tool supported from said frame, means for adjusting said tool vertically at either end, laterally with respect to said frame, angularly with respect to the line of draft, and angularly with respect to the surface of the road, and control means for operating said adjusting means including a drive connection to accomplish adjustment of said tool angularly with respect to the surface of the road, comprising a shaft on said frame, a second shaft movable as a unit with said tool upon vertical and lateral adjustment thereof, a third shaft movable as a unit with said tool upon angular adjustment thereof with respect to the line of draft, and flexible con nections between said shafts.

19. In a road machine, a main frame, an earthengaging tool, an auxiliary frame, means mounting said tool on said auxiliary frame for adjustment relative thereto, such relativeadjustment including an adjustment angularly with respect to the line of draft and a second adjustment with respect to said auxiliary frame, means mounting said auxiliary frame on said main frame for adjustment relative thereto, means for effecting said second adjustment of said tool with respect to said auxiliary frame, control means for said means for effecting said second adjustment having a fixed position on said main frame, and a flexible drive connection extending from said control means to said means for effecting said second adjustment, said drive connection having a portion coinciding with the axis of rotation of said tool during adjustment of the angular relation thereof with respect to the line of draft.

20. In a road machine, a main frame, an auxiliary frame mounted on said main frame for vertical and lateral adjustment with respect thereto, a circle rotatably supported by said auxiliary frame and having spaced tool mounting extensions thereon, a tool, spaced pivotal connections between said tool and said extensions, adjustable connecting means between said tool and said extensions for effecting adjustment of said tool about said pivotal connections, rotatable shafting disposed in substantially parallel relation to said tool and connected to said adjustable connecting means, and operating means for said shafting including" gearing and flexible shafts, said operating means extending from said shafting to said main frame and having a portion substantially coinciding with the axis of rotation of said circle.

21. In 'a road machine, a main frame, an auxiliary frame mounted on said main frame for vertical and lateral adjustment with respect thereto, a circle rotatably supported by said auxiliary frame and having spaced tool mounting extensions thereon, a tool, spaced pivotal connections between said tool and said extensions, adjustable connecting means between said tool and said extensions for effecting adjustment of said tool about said pivotal connections, each adjustable connecting means comprising a link member pivotally connected at one end to said tool and actuating means connected to each extension for moving each link member, rotatable shafting mounted in substantially parallel relation to said tool and operatively connected to each adjustable connecting means to accomplish adjustment thereof, and operating means for said shafting including gearing and flexible shafts, said oper: ating means extending from said shafting substantially through the axis of rotation of said circle to a fixed position on said main frame.

22. In a road machine, a main frame, an auxiliary frame having a draft connection with said main frame and supported for vertical and lateral adjustment with respect thereto, an earth-engaging tool, a tool supporting member rotatably supported by said auxiliary frame, pivotal connecting means between said tool and said tool supporting member, adjustable connecting means between said tool and said'tool supporting member for effecting adjustment of said tool about said pivotal connecting means, shafting mounted in parallel relation to said tool and connected to said adjustable connecting means for effecting adjustment thereof, and operating means for said shafting including gearing and flexible shafts, said operating means extending from said shafting to said main frame and having a portion substantially coinciding with the axis of rotation of said member.

23. In a road machine, a main frame, an auxiliary frame pivotally connected to said main frame, a circle assembly supported by said auxiliary frame for rotation about an axis fixed with respect to said auxiliary. frame, a tool, means for adjustably supporting said tool on said circle assembly for movement relative thereto, means for adjusting said auxiliary frame together with said circle assembly and said tool as a unit, and means for effecting adjustment of said tool; said latter means comprising driven mechanism supported by said circle assembly, driving mechanism supported by said main frame, a shaft supported for rotation substantially about said axis of rotation of-said circle assembly, .and flexible connecting means between an end of said shaft and said driving mechanism on said main frame to enable adjustment of said tool in any adjusted CARL O. -WOLD.' 

